TY  - RPRT
TI  - Calculation method for retinal irradiance from extended sources.
AU  - C Campbell
PY  - 1994
DO  - 10.1111/j.1475-1313.1994.tb00021.x
UR  - https://pubmed.ncbi.nlm.nih.gov/7970753/
ID  - 7970753
ER  -